231138068 has 48 divisors (see below), whose sum is σ = 470851584. Its totient is φ = 97238880.

The previous prime is 231138049. The next prime is 231138101. The reversal of 231138068 is 860831132.

It is a happy number.

231138068 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629621 + ... + 629987.

It is an arithmetic number, because the mean of its divisors is an integer number (9809408).

Almost surely, 2^231138068 is an apocalyptic number.

231138068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

231138068 is an abundant number, since it is smaller than the sum of its proper divisors (239713516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231138068 is a wasteful number, since it uses less digits than its factorization.

231138068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 231138068 is about 15203.2255788040. The cubic root of 231138068 is about 613.7014644374.

The spelling of 231138068 in words is "two hundred thirty-one million, one hundred thirty-eight thousand, sixty-eight".